When your car's Check Engine light comes on, it's usually accompanied by a sinking feeling in the pit of your stomach. The light could mean a costly problem, like a bad catalytic converter, or it could be something minor, like a loose gas cap.
If you experience any bleeding period after this 20 days, it will probably be the real period. This normally comes at about 4 to 6 weeks after the miscarriage.
Physical recovery from miscarriage in most cases will take only a few hours to a couple of days. Your periods will likely return within four to six weeks, and it's possible to become pregnant during the menstrual cycle immediately after a miscarriage.